SUV

Off-road vehicles are cars specially designed for off-road. The main features are four-wheel drive, higher chassis, better grip tires, higher exhaust pipe, larger horsepower and thicker bumper. Off-road vehicles can not only adapt to various road conditions in the field, but also give people a feeling of rough madness. In the city, there are also many people who like to drive off-road vehicles.

Introduction Off-road vehicles are members of a large family of military vehicles. Most of them have certain off-road driving capabilities. In other words, these cars can run on poor roads or areas and battlefields where there is no road at all, and therefore have the ability to “work hard”. Later, in order to meet the needs of combat, another military vehicle with more off-road capability emerged. It is often referred to as a military off-road vehicle. There are three brethren in off-road vehicles, and their comprehensive capacity is different. Heavy load capacity is called heavy off-road vehicles; light load capacity is called light off-road vehicles; and between light and heavy weight is called medium-sized off-road vehicles.

Off-road vehicles are generally all-wheel-drive, with six-wheel drive off-road vehicles in addition to four- and eight-wheeled all-wheel-drive vehicles. Their outstanding advantages are the heavy load and strong off-road ability. With a six-wheel drive medium-sized off-road vehicle, it can carry 7 tons of load, with a maximum speed of 90 kilometers per hour and can climb a slope of 60 degrees.

Fully driven, after a wheel slips into the mud, the other wheels can drive the car out of trouble, otherwise it will have to wait for others to drag.

History 1. In the earliest development of a car, it became an extremely luxurious, symbolic identity item. With the continuous progress of society, the car has gradually become a tool for transporting and transporting, and it has also evolved a variety of differences. The use of the car, but also from its functioning more and more detailed, which evolved a model is an off-road jeep. Its birth has undoubtedly produced unlimited contributions.

2. After the end of the Second World War, General Eisenhower said: The United States won the war by relying on three tools: jeep, landing craft, and Dakota transport. Jeep has a simple structure, strong and versatile, can run on a variety of terrain, can complete a variety of tasks, the earliest vehicles designed specifically for the war, greatly improved mobility, made a great contribution to the war.

3, Jeep's lines are square, there is no any performance-related accessories, in the design and manufacturing process only consider the strong and practical, processing is simple, low cost, and seems to have nothing to do with the artwork. In fact, this is a prejudice. The appearance of a jeep, whether it is for transportation, transportation, traction, comfort, luxury, luxury, and beauty is not its essence. The soul of a jeep is to carry you to as many places as possible, whether it be deserts, beaches, mountains, mud, snow, or steep slopes... Artists give life with the simplest lines and shapes. In the New York Museum of Modern Art, a total of eight cars are displayed as artworks. The most prominent display is an American military Jeep in World War II.

4. The jeep is everywhere, and the omnipotent image is representative of ambiguity, enthusiasm, ruggedness, tenacity and simplicity. Therefore, the fans who love it are very much. It is our true enjoyment that the difficult trek on the sinister road. It should be a manifestation of a buggy culture. It brings together people who love nature and feel the joy they bring to them. As such, it represents a new and increasing consumer trend, and various auto companies are also developing high-level light off-road jeep.

5. In many countries, especially in the West, there are few special titles for off-road vehicles, but off-road (oof road) is very common, that is, driving off the road. This requires four-wheel drive off-road vehicles as carriers. The four-wheel-drive vehicle is designed to improve the car's ability to degrade on harsh roads. It uses four-wheel drive to evenly distribute the engine's power to the four wheels, greatly reducing wheel slippage and idling. The torsional force applied to each wheel is less likely to exceed its own grip performance. The grip of tires is most affected in muddy, wet and slippery roads and snow. The four-wheel drive has a great advantage. In addition to safety, it also opens up more quickly. The four-wheel drive modes are: 2H-high speed second wheel (4x2) drive, urban and good road use; 4H---high speed four wheel (4x4) drive, snow and slippery road use; 4L---low speed Four-wheel (4x4) drive, which requires a great deal of torque, for example: rugged mud, sand and dangerous slopes. However, if you want to master it, you need actual operation and rich off-road experience.

6, in order to greater off-road vehicles to improve performance, but also need to master the structure of off-road vehicles, and then be modified. Basic modifications such as: strengthening the chassis, raising the ground clearance, allow the wheel to have greater fluctuation range, change the suspension system, enhance the wading ability, the central differential, the central differential lock and so on. There must also be plans and standards when refitting, but even more economical. With these modifications, it can be regarded as a cross-country jeep with superior performance, in order to conquer sinisterness and experience a greater degree of fun, but it also requires solid off-road driving technology and experience as a solid backing. Even if the off-road vehicle is still deep down, it is necessary to know a lot of practical self-help methods. This is another great pleasure.

7, in short, four-wheel drive off-road vehicle contains a very large temptation, once you fall in love with it you will not extricate themselves, but it will also bring you can not use other alternative fun, it is worth to deeply appreciate!

performance

The principle of off-road is not only for military use, but also for mining. Many mining vehicles are all-wheel-drive, Three Bridges have no predecessor, and weight-bearing is also a problem. Pulling dozens of tons of hundreds of tons of ore has two bridge designs. difficult. The principle of the differential is that if one wheel loses enough friction, it will idle at twice the speed. Usually all-wheel-drive will be able to solve the problem. To improve performance, a differential lock is needed to lock in the differential effect. This is not very useful, and it is not complicated. The tractor is designed for tractors in the South Paddy Field. Cars have this, basically a kind of meaningless "full configuration", just like cigarette lighters, rarely used.

All-wheel drive with all-wheel drive, you can leave the road off-road, but through the ability, different layout design is not the same. First of all, the basic knowledge is that the chassis should be high. This depends on the diameter of the tire. In theory, the layout is to get three indicators: proximity angle, departure angle, pass radius. The approach angle is the slope of the car from which it can climb (it is not until it reaches the top, it is only near success). It consists of the angle of the off-road vehicle formed by the front wheel and the bumper. If the approach angle is small and the actual slope is large, then the wheel has not gone uphill and the bumper will touch the road. Taking the wall as an example, any car cannot have a 90-degree angle of approach. The wheel does not touch the wall at all and the bumper is able to withstand it, so it cannot reach the wall. Must be the car touched the wall.

If the front trimming is outside the body and can touch the wall first, then there is a 90% approach angle, and you can theoretically climb the wall. Contrary to the departure angle, the rear wheel and the rear edge of the car make up the decision to leave the car. If this angle is not enough, then when the car goes downhill and turns flat, the rear wheel has not yet reached the road level, the body scrapes onto the road surface, and the rear wheel turns into a “hanging temple”. This car is just like being fixed and cannot move. Similarly, if the rear trimming is outside the body, there is also a theoretical 90% departure angle that may leave the wall.

Two rounds and two rounds, with the bottom of the bottom of the car (usually the drive shaft), three points a circular arc, that is, through the radius. This decision can cause too much embankment type obstacles. If the passing radius of the car is too large, then through a small obstacle, the car body or the drive shaft will touch the obstacle before the front wheel hits the ground. If it is serious, it will be racked up and become a seesaw. Now. The rear drive shaft will of course be damaged.

There is also a basic common sense of comfort, that is, comfort, which is directly related to the track distance. The geometrical principle is easy to understand. The farther the wheel is, the smaller the swing angle of the body is when the front and rear wheels pass through the obstacle in order, if the two wheels are separated by 100 meters, When rolling over a brick, the position of the person in the car is only up and down, this may be eliminated by the spring, and the angle will almost not have the same "front-to-back" change. This is why the presidential car is three, in order to lengthen the track and improve comfort. The track distance directly affects the passing radius. If you have a satisfactory passing radius, you cannot have a long track. Therefore, the real 212 off-road vehicle cannot be comfortable. The two are incompatible with each other. If you don't have me, you don't A total of Daitian. The fourth indicator is the ability to grade, the percentage of highway design, the railway design by 1000, and the vehicle design are expressed in terms of angles. This is an unreasonable contradiction and requires conversion. The climbing ability is mainly determined by the engine torque, and the diesel engine is better than the gasoline engine. There are actually other factors, such as when the oil level is tilted, the tank and the oil pump must be able to suck the oil.